针对大多数常规红外成像系统单帧成帧时间内探测器组件响应动态范围有限，以及超帧算法需要借助其他复杂装置或专用电路的不足，提出了一种基于不同积分时间帧累加的红外图像超帧处理方法，采用电子学处理方法对整个超帧处理过程进行了研究。分析了限制红外探测器响应动态范围的原因，简单介绍了帧积分方法的原理和利弊。然后对不同积分时间下获得的图像进行了非均匀性校正、帧信息融合和新帧映射。实验结果表明: 本文方法提高了系统的噪声等效温差(NETD)，捕获了更多的场景原始图像信息，丰富了图像的灰度层次，增加了图像的信息熵。该方法能够等效拓展探测器的响应动态范围，增加场景原始信息的捕获，提高成像系统的输出信号信噪比以及探测灵敏度。

Frame processing method offers a model-based approach to Inverse Synthetic Aperture Radar (ISAR) imaging. It also provides a way to estimate the rotation rate of a non-cooperative target from radar returns via the frame operator properties. In this paper, the relationship between the best achievable ISAR image and the reconstructed image from radar returns was derived in the framework of Finite Frame Processing theory. We show that image defocusing caused by the use of an incorrect target rotation rate is interpreted under the FP method as a frame operator mismatch problem which causes energy dispersion. The unknown target rotation rate may be computed by optimizing the frame operator via a prominent point. Consequently, a prominent intensity maximization method in FP framework was proposed to estimate the underlying target rotation rate from radar returns. In addition, an image filtering technique was implemented to assist searching for a prominent point in practice. The proposed method is justified via a simulation analysis on the performance of FP imaging versus target rotation rate error. Effectiveness of the proposed method is also confirmed from real ISAR data experiments.